Optical temperature measurement technique utilizing phosphors
Fiber optical temperature sensors
Optical system for an instrument to detect the temperature of an optical fiber phosphor probe
Optical fiber thermometer
Fiber-optic luminescence sensor utilizing interference in a thin layer structure
Luminescent sensor for an optical temperature-measuring device Patent #: 4592664
ApplicationNo. 06/854631 filed on 04/22/1986
US Classes:374/161, Change of optical property374/127, Having significant frequency limitation or relationship (e.g., peak, ratio)374/131With radiation conducting element
ExaminersPrimary: Shoap, Allan N.
Assistant: Will, Thomas B.
Attorney, Agent or Firm
International ClassesG01K 11/00 (20060101)
G01K 11/32 (20060101)
AbstractA method and apparatus are provided for remotely monitoring temperature. Both method and apparatus employ a temperature probe material having an excitation-dependent emission line whose fluorescence intensity varies directly with temperature whenever excited by light having a first wavelength and whose fluorescence intensity varies inversely with temperature whenever excited by light having a second wavelength. Temperature is measured by alternatively illuminating the temperature probe material with light having the first wavelength and light having the second wavelength, monitoring the intensity of the successive emissions of the excitation-dependent emission line, and relating the intensity ratio of successive emissions to temperature.